How to calculate Local Anesthesia _ Part 1 _ General Understanding

Local Anesthesia Calculation
Why 2% lidocaine = 34mg?
"2%" indicates that there are 2 grams of lidocaine in every 100 milliliters (ml) of solution.2g(2000mg) * 1.7ml = 100ml * X
x = (2 * 1.7) / 100
x ≈ 0.034 grams
To convert grams to milligrams (since 1 gram = 1000 milligrams):
0.034 grams * 1000 = 34 milligrams
Question
Maximum total dose of lidocaine (mg)?
Maximum total dose of articaine (mg)?
Maximum dose of lidocaine (mg/kg)?
Maximum dose of articaine (mg/kg)?
Patient is 66lb. what is their max dose of la for 2% lidocaine 1:100k epi?
Answer:
66 𝑙𝑏 ∗ 2𝑚𝑔 𝑙𝑏 = 132.0 𝑚𝑔 𝑀𝑎𝑥 𝑑𝑜𝑠𝑒
132.0 𝑚𝑔 x 1 carpule/34mg= 3.88 carpules
OR
66lb / 17lb/carpule = 3.88 carpules
3.5 carpules
OR
66lb = 29.9kg
29.9kg * 4.4mg/kg = 131.7mg (max dose)
131.7mg * 1 carpule/34mg = 3.8 carpules (max carpules)
Patient is 66lb. what is their max dose of la for Articaine (4%) with 1:100K epi?
Answer:
66 𝑙𝑏 ∗ 3.2𝑚𝑔/𝑙𝑏 = 211.2𝑚𝑔 𝑀𝑎𝑥 𝑑𝑜𝑠𝑒
211.2 𝑚𝑔 x 1 carpule/68mg= 3.1 carpules
66lb = 29.9kg
29.9kg * 7mg/kg = 209.5mg (max dose)
209.5mg * 1 carpule/68mg = 3 carpules (max carpules)